6. Save more than a quater of electric bill

Residential private Home

Before

After

Overview - exterior renovation
     Installation - July 2011
     Applied - Roof / Exterior 2153 ft² (200㎡ )
     Region - Kouchi Prefecture Japan
     Color - Roof - Grey (N-50)
                 Exterior - Med Grey (25-60B)

Electric bill comparison

Results - Energy Bill reduction:
     Summer -  28.4%
     Winter - 26.3%

2010
         July(7),August(8),September(9)
Before - ￥39,493
After - ￥28,270

2010 - 2111
       December(12),January(1),February(2)
Before - ￥59,979
After - ￥44,181